Birds can fly because they have(a) a streamlined body(b) hollow bones(c) wings with feathers(d) all of these
Question 22 Which of the following statements are true for eukaryotic cells?
(i) They do not have a nuclear membrane. (ii) They have a well organised nucleus. (iii) They have a nuclear membrane. (iv) Blue green algae are eukaryotic cells. (a) ii and iv (b) ii and iii (c) i and ii (d) i and iv
Adult human RBCs are enucleated. Which of the following statement(s) is/are the most appropriate explanation for this feature? (a) They do not need to reproduce. (b) They are somatic cells. (c) They do not metabolise. (d) They have a high surface area to volume ratio for more oxygen to be transported.